Improvement in glass-furnaces



S. RICHARDSON.

Glass-Furnaces.

Patented Nov. 10,1874.

WITNESSES:

monuns.

THE GRAPHIC CO. FHOTOUTI'LHS & 4-! PARK FLACLNX.

UNITED STATES FATENT OFFICE.

SAMUELRIGHARDSON, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN GLASS-FURNACES.

Specification forming part of Letters Patent No. 156,743, dated November10, 1874; application filed September 5, 1874.

To all whom it may concern:

Be it known that I, SAMUEL RICHARDSON, of Brooklyn, in the county ofKings and State of New York, have invented a new and ImprovedGlass-Furnace, of which the following is a specification:

The invention will first be fully described, and then pointed out in theclaims.

Figure l is a sectional elevation of my improved furnace, and Fig. 2 ispartly a horizontal section and partly a plan view.

Similar letters of reference indicate corresponding parts.

A represents the two compartments or ovens of a double glass-meltingfurnace, which I propose to make in a single stack or chimney byseparating the ordinary furnace with a double partition, B, with anair-space, G, for keeping one side cool while the other is hot. Drepresents a furnace outside of each compartment for burning the fueland discharging the heat in through the side. It has an opening, E,through thetop, covered by a slide, F, to admit the fuel, and over theopening a charging hopper, G, from which the fuel may be let into thefurnace at any time merely by drawing out the slide H. The air for thesupport of combustion will be admitted to the furnace from the pit belowthe same, as in the old arrangement. I represents the glass melting potsin the ovens A, into which the heat passes through the opening J, andfrom which the smoke escapes, through passages K, to the stack orchimney L. M represents the passage through the floor of the oven to apit below, for receiving the glass which escapes from the pots. N is thepassage in the floor leading to the pit.

It will be seen that by this arrangement of the furnaces they can bereadily and quickly fed by a boy,-Whereas the old way in which the fuelis supplied through a channel in the floor to the middle of the ovenrequires a man of great physical strength, who must have long experienceto do it successfully, and at best it requires from twenty to thirtyminutes, during which time cold air rushes in at the open doors andchills the fires greatly.

By having the fire-place on the outside it can be repaired or rebuilt atany time in a few hours without injury to the oven or main furnace,whereas by the old. arrangement the whole furnace had to be blown or letout, and all the pots destroyed, at great loss of labor, material, andtime, the time being generally from four to six weeks.

i The main furnace can be contracted about one-fourth in size with thefire-place outside, and at the same time hold the same number of pots,by which the first cost will be less, and it will not require so muchfuel to do the same work.

By making the furnace double it enables the temperature in one part tobe lowered greatly for tempering the melted glass suitably for workingproperly, while a higher heat is maintained in the other for melting theglass,

thus enabling the melting tobe carried on in one part while the workingof the glass is going on in the other part, which is often verydesirable.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- 1. The double furnace A, separated by a partition, BB, and having intermediate air-space (J, as and for the purposedescribed.

2. A furnace-floorprovided with thepassages M N, leading to a subjacentpit, as and for the purpose specified.

SAMUEL RICHARDSON.

Witnesses:

A. P. THAYER, ALEX. F. ROBERTS.

